WorksheetsUnit 4 Pre-Test
Total questions: 30
Worksheet time: 29mins
Genetics is the study of _________.
Body Systems
Cell Divisions
Heredity
Sexual Reproduction
Chromosomes carry _____________ which express specific traits.
Genes
Information
DNA
All of the above
The variance in a gene, which occur on a fixed spot on a chromosome is called a/an _________.
Allele
Cell
Centromere
Nucleus
On a Punnett square two capital letters indicate a gene which is_________.
Homozygous dominant
Homozygous recessive
Heterozygous
None of the above
Probability in genetics is expressed in _________.
Equations
Fractions
Percentages
Whole numbers
Genetic variation occurs in what type of reproduction?
Asexual
Sexual
Both
List three examples of genetically inherited traits.
The (a) represents the genetic makeup of an organism, while
the (b) represents the appearance of an organism.
Using this Punnett square above, answer the following questions.
a. What genotype are the a father and mother in this Punnett square? (a)
Using this Punnett square, answer the following questions.
b. If A is dominant for dimples, and a is recessive for no dimples, what is the probability the child will have dimples? (a)
A mutation is defined as:
A change in the cell's structure
Anything that changes in an embryo
Any change in the physical features of a human
A change in the DNA sequence
Mutations are random.
True
False
Increases chances of survival
Decreases chances of survival
Increases chances of developing cancer
Decreases skills
In which ways can genetic engineering can improve crops
Make them pest or drought resistant
Make them more nutritious
Make them larger
All answers are correct
genetically made organism
genetically modified organism
gene manipulated organism
Genetic mutant organism
1. The process of choosing parent organisms for desired characteristics is called
natural selection
Artificial selection
random selection
genetic manipulation
What is an example of artificial selection?
Letting dogs choose their own mate
Letting plants pollinate on their own
Crossing a labrador and a poodle to create a labradoodle
1. Artificial selection has been a big factor in the evolution of:
Dogs
Panda bears
Snakes
Jellyfish
Which statement is true comparing natural selection and artificial selection?
In natural selection, traits benefit humans and in artificial selection, the traits benefit the species
In natural selection, traits benefit the species and in artificial selection, the traits benefit humans
In natural and artificial selection, the process takes hundreds of years to occur
In natural and artificial selection, nature determines what traits will be passed down to offspring.
Artificial selection is also known as
natural selection
selective hearing
genetic manipulation
selective breeding
What is the condensed form of DNA called?
Chromosome
Gene
Nucleotides
Nucleus
Where is DNA found in a human cell?
ribosome
nucleus
cell membrane
cytoplasm
What does a Punnett Square determine?
all of Mendel's discoveries about genetic crosses
all the outcomes of a genetic cross
only the recessive allele combinations
only the dominant allele combinations
Scientists call an organism with two different alleles for a trait
factor
purebred
trait
hybrid
